With Kevin Smith’s latest film, Zack and Miri Make a Porno, hitting theaters this Friday, we at /Film thought it might be a good time to take a look back at the history of fictional pornographic movies. Typically, unless the movie you are watching is itself a porno, porn plays a minor role in films, skirting around the edges and marginally infusing the proceedings with a dollop of sexuality. However, the following pornos have all in some way wormed their way into becoming major plot devices for (mostly) memorable movies. Here are five of the most infamous fake pornos, as seen in films:

Porno: Logjammin’

As Seen In: The Big Lebowski

Remember when Tara Reid was still considered sexy? Neither do I, but apparently at some indeterminate time in the past, Reid was seen as hot enough to be tapped for the role of trophy wife and porn star in the Coen brothers hilarious stoner comedy, The Big Lebowski. In one of the pivotal scenes in this film’s labyrinthine plot, Maude Lebowski and the Dude come to the realization that the Nihilists aren’t actually involved in kidnapping Reid’s character, Bunny, at all!

This porno begins to answers questions we never even wanted to ask. What does Tara Reid look like in a porn film? What are the physical mechanics of efficient German lovemaking? Who would possibly want to see Peter Stormare naked? Either way, Julianne Moore’s brilliant deadpan commentary make this porno one for the books.